//
//  Iterator.h
//  LearnObjectiveC
//
//  Created by client on 2017/9/9.
//  Copyright © 2017年 吴可高. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface Iterator : NSObject
@property(nonatomic,copy) NSString * value;

-(NSObject*)previous;

-(NSObject*)next;

-(BOOL)hasNext;

-(NSObject*)first;

@end

